call.rb

class Caller
  class << self
    def call(id:)
      puts id
    end
  end
end

######

class Caller
  def self.call(id:)
    new(id: id).call
  end

  def initialize(id:)
    @id = id
  end
  
  def call
    puts id
  end
  
  attr_reader :id
end